The molality (m) of a solution is referred to as the measurement of the moles of solute divided by the solvent (either in liters or kilogram).
Mathematically;
[tex]\mathbf{Molality = \dfrac{\text{moles of solute}}{volume\ of \ solvent}}[/tex]
However, the mole fraction is the ratio of a particular substance molecule inside a mixture related to the overall number of moles of all the substances.
For a given mixture of C6H6 and CCl4
Their mole fraction can be expressed as:
[tex]X_{C6H6} = \dfrac{mole \ of \ C_6H_6}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
[tex]X_{CCl_4} = \dfrac{mole \ of \ CCl_4}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
where;
mole fraction of C6H6 = 0.7mole fraction of CCl4 = ???We know that:
[tex]\mathbf{X_{C6H6} + X_{CCl_4} = 1}[/tex]
[tex]\mathbf{ X_{CCl_4} = 1-X_{C6H6} }[/tex]
[tex]\mathbf{ X_{CCl_4} = 1-0.7}[/tex]
[tex]\mathbf{ X_{CCl_4} =0.3}[/tex]
∴
[tex]0.3 = \dfrac{mole \ of \ CCl_4}{mole \ of \ C_6H_6 + mole \ of \ CCl_4}[/tex]
where;
n represents the number of moles;
[tex]\mathbf{0.3 = \dfrac{n_{ CCl_4}}{n_{C_6H_6 }+ n_{ CCl_4}}}[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }+ 0.3 n_{ CCl_4} = n_{ CCl_4}}[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }= n_{ CCl_4}-0.3 n_{ CCl_4} }[/tex]
[tex]\mathbf{0.3n_{C_6H_6 }= 0.7n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}---(1)}[/tex]
Assuming, we have 1 Liter of the solution;
Then,
the mass of the solution = 0.9 g/mol × 1000 mlmass of the solution = 900 gRecall that:
mass of the solution = mass of the solute + mass of the solvent
where;
mass of the solute = no of moles of [tex]\mathbf{n{CCl_4}}[/tex] × molar mass of [tex]\mathbf{n{CCl_4}}[/tex]
mass of the solvent = no of moles of [tex]\mathbf{n{C_6H_6}}[/tex] × molar mass of [tex]\mathbf{n{C_6H_6}}[/tex]
∴
900 g = ([tex]\mathbf{n{C_6H_6}}[/tex] × 78) + ([tex]\mathbf{n{CCl_4}}[/tex] × 154)
From equation (1);
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}---(1)}[/tex]
replacing the value of [tex]\mathbf{n{C_6H_6}}[/tex] into 900 g = ([tex]\mathbf{n{C_6H_6}}[/tex] × 78) + ([tex]\mathbf{n{CCl_4}}[/tex] × 154); we have:
[tex]900 g = (\mathbf{\dfrac{ 0.7}{0.3}n_{ CCl_4}}\times 78) + ( n_{ CCl_4}}\times 154)[/tex]
[tex]900 g = (\mathbf{\dfrac{ 7}{3}n_{ CCl_4}\times 78) + ( n_{ CCl_4}}\times 154)}[/tex]
[tex]900 g = (\mathbf {7}\times n_{ CCl_4}\times 26) + ( n_{ CCl_4}}\times 154)}[/tex]
[tex]\mathbf{900 g = (\mathbf {182 +154)}n_{ CCl_4}}[/tex]
[tex]\mathbf{900 g = (\mathbf {336)}n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{ CCl_4}=\dfrac{900 g}{336}}[/tex]
[tex]\mathbf{n_{ CCl_4}=2.679}[/tex]
From equation (1)
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}n_{ CCl_4}}[/tex]
[tex]\mathbf{n_{C_6H_6 }=\dfrac{ 0.7}{0.3}\times 2.679}[/tex]
[tex]\mathbf{n_{C_6H_6 }=6.25}[/tex]
Finally, the molality of the solution is:
[tex]\mathbf{Molality = \dfrac{\text{moles of solute}}{volume\ of \ solvent}}[/tex]
[tex]\mathbf{Molality = \dfrac{\text{2.679}}{900}\times 1000}[/tex]
Molality = 2.976
Molality ≅ 3.0 m
Therefore, we can conclude that the molality of a solution prepared by mixing C6H6 with CCl4 is 3.0 m.
Learn more about Molality here:
https://brainly.com/question/4580605?referrer=searchResults
Where would you first put a physical exam finding of abdominal tenderness and a positive urine pregnancy result
Answer:
objective
Explanation:
The assessment is the first step of nursing process and collection of data is the essential for assessment part. If a patient seek medical care ,the first step is the assessment of clients condition.
A person is having trouble breathing and is rushed to the hospital. Which body cavity will the doctors most likely check first to find the problem?
Explanation:
1.Chest X-ray. It can show the
doctor signs of conditions such
as pneumonia or other heart
and lung problems. ...
2.Oxygen test. Also called pulse
oximetry, this helps your
doctor measure how much
oxygen is in your blood. ...
3.Electrocardiography (EKG).
I hope it will help....
Answer:
the thoracic cavity
Explanation:
When do you need to tell your manager that you are sick ??
A. When you have diarrhea
B. When you have heartburn
C. When you have a headache
D. When you have a pollen allergy
Hi,
Answer:
When do you need to tell your manager that you are sick ??
A. When you have diarrhea
There is no federal statute that prevents sick people from losing their jobs. Additionally, there is no law requiring paid sick leave for those who are ill. A lot of sick days Absenteeism causes several issues for supervisors and co-workers, as well as elicits strong emotions. Thus option A is correct.
What role of manager that you are sick?Employee holiday policies are typically up to the discretion of the employer. When you desire PTO, they can make you fill out a paperwork, ask you to book your holiday weeks in advance, and make you call in everyday you are unwell.
Maintaining accurate records of all employee absences and of your interactions with them regarding their illness and absence are essential to managing sickness successfully. Include any supporting documents, including Fit Notes and medical proof. You'll need an absence management system for this.
Therefore, When you have diarrhoea.
Learn more about sick here:
https://brainly.com/question/12883645
#SPJ2
What is histology the study of?
O the thyroid
O the liver
O tissue
o the uterus
Histology is the study of tissues in living organisms, which is the third option. Details about histology can be found below.
What is histology?Histology is a term used to refer to the study of the microscopic structure, chemical composition and function of the tissue or tissue systems of plants and animals.
Tissues are collection of cells that have similar functions in the body of an organism. Examples of tissues are as follows;
BloodHepatic tissuesBone tissuesTherefore, histology can be said to be the study of tissues in living organisms.
Learn more about histology at: https://brainly.com/question/10865552
#SPJ1
Answer: The Tissue
Explanation: Got it right on edge.
Upholstered furniture in the reception area should be
shampooed at least once every
Select one:
O A. six months.
O B. 24 months.
O C. three months.
O D. 12 months.
Answer:
C
Explanation:
Which of the following statements is false regarding the pharmacology of Endocrine glands?
Answer:
make hormone that control mood ,growth and development,metabolism,organ,reproductioncontrol in release of hormonesend hormone into your blood stream so they can travel to other partWhat is the difference is Licensure, Regulation, and Accreditation?
Answer:
Licensure is about getting the legal right to practice or serve in a specific role. Accreditation is about enabling a facility to have the respect of its industry peers. Another critical distinction between licensing and accreditation is who they apply to. A license applies to a single individual looking to practice
Answer:
Licensure is the act of granting authority by the state. Each state has agencies responsible for issuing and renewing licenses to health care professionals.
Registration means that you have graduated from an accredited school and have passed a standardized national exam administered by a nongovernmental agency.
Accreditation is an educational institution that is recognized by an outside agency, such as national board or commission, as having standards that qualify graduates for professional practice.
Explanation:
Choose all correct answer
Which of the following are known causes of pneumonia? a) bacteria b) allergy oak) viruses d) fungi u e) parasites
Why did they change to unleaded fuel for cars
How many calories are in a food that contains 12g carbohydrate, 3 g alcohol, 0g fat, and 3g protein?
Describe what life span considerations you might use in applying the nursing process to infants, school-age children, younger adults, and older adults in relation to immunizations and wellness
A food worker has been slicing melons for four hours. Her single-use gloves are intact. Should this food worker change her gloves?
A. No, because her gloves are not torn.
B. Yes, because she should use cloth gloves instead.
C. No, because she may wear the gloves for up to six hours at a time.
D. Yes, because pathogens on the gloves may have multiplied to dangerous levels. CUIRMAIT
Fever clearly serves a purpose, namely to _____, and reducing the fever through available medications may actually lengthen the time one is sick.
Answer:
i d k
Explanation:
Fever clearly serves a purpose, namely to kill germs, and reducing the fever through available medications may actually lengthen the time one is sick.
What is fever?
Definition: Fever is a rise in temperature due to invading of foreign particles namely germs that can lead to sickness in a living organism.
Fever is usually caused when the body is trying to fight the invaded pathogen. Consumption of anti-fever drugs will only reduce the fever that can suppress the body's natural response to germs and hence the time taken for the body to recover from the invaded pathogen is prolonged.It is hard for germs such as bacteria or virus to survive when the temperature is high.To learn more about fever and germs, refer:
https://brainly.com/question/11314325
#SPJ2
How does poverty impact a substance abuser?
Answer:
Poverty leads to mental states which can lead to drug abuse which leads to addiction, which begets crime, which leads to worse employment prospects
Hi :)
Usually poverty causes sadness and lack of hope so people go abuse substances as a coping method. This is why substance abuse is very common is lower class incomes. If someone has no money, is constantly sad, they will try to abuse a substance as an "escape".
what effect does the ARV have on the red blood cells
Answer:
HIV may affect erythropoiesis directly through infection of red cell precursors and bone marrow stromal cells.
A 70-year-old female has been admitted to the hospital. The client has had nausea and vomiting for the past three days. Upon admission the client is slightly confused and weak. Her vital signs are: 99 F (37.2 C), respirations 20 breaths/minute, pulse 102 beats/minute, BP 96/66 mm Hg, and her pain level is an "8"on a scale of 0-10. Breath sounds are clear bilaterally upon auscultation. Pulse oximetry is 95% on room air. Bowel sounds are absent in the right and left lower quadrants and in the left upper quadrant. Abdomen is hard and distended. When questioned as to her last bowel movement, the client responds, "I have not moved my bowels in over one week." Mucous membranes dry; skin turgor poor. 11. What would be a priority nursing diagnosis for this client? List one short-term goal. List three interventions for your priority nursing diagnosis.
Priority nursing diagnosis for this client is intestinal narrowing.
What can cause bowel narrowing?Bowel obstruction can be caused by fibrous scarring bands of tissue inside your abdomen (adhesions) that form after
SurgeryInflamed or infected "bags" in your intestines (diverticulitis)Hernias or Even tumors.The interventions made could beAbdominal X-ray, which can find blockages in the small and large intestinesCT scan of the abdomen, which helps identify whether the blockage is partial or complete, or if you have a tumor in your abdomenBloodtests.Whit this information, we can conclude that Priority nursing diagnosis for this client is intestinal narrowing.
Learn more about intestinal narrowing in brainly.com/question/13050260
Which type of study examines disease in populations?
Answer:Epidemiology
Explanation:
Epidemiology is the study of the distribution of diseases and other health related conditions in the population.
Time management is a crucial part of being a successful student and a successful medical assistant. What are some methods Shawna can implement to help her manage her time as effectively as possible?
Answer:
BY PLANNING HER DAILY ROUTINE
Explanation:
One of the methods that Shawna can implement to help her manage her time effectively is the planning and prioritizing method. This will help her attend the important and the urgent tasks in her studies first to avoid late submission of assignmen
1. Describe what constitutes the central nervous system and its functions.
Answer:
the brain and spinal cord
Explanation:
The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
The distal end of the femur and the proximal ends of the tibia and fibula
Answer:
The tarsal that articulates with the distal end of the tibia is the talus. The talocrural which is the ankle joint is the articulation between the distal ends of the tibia and fibula with the proximal end of the talus.
Explanation:
These are medicines that are often used to thin the mucus secretion in the nasal passages. a) decongestants b) radioactive isotopes c) expectorants d) antibiotics and anti-inflammatories
Please put the following symptoms of the common cold in the order in which they usually appear. Runny nose, itchy throat, cough, chest congestion
Answer: itchy throat, runny noes, cough, chest congestion
Explanation: :)
COJ
Dashboard
5
0/1 point
Courses
Since one mL of water weighs 1 g, how many grams of water are needed to prepare #60 2-g suppositories using the following recipe?
Glycerin suppositories
Glycerin 70 parts
Gelatin 20 parts
Purified water 10 parts
PER
Calendar
+ Venu
O 848
Inbox
O 128
History
Х
O 120 g
SITE
Studio
0248
Lauren les
It is given that, 2 g of suppositories is needed to prepare. The part of water in the whole of the given composition is 10. The 10% of 2 g is 0.2 g. Therefore, 0.2 g of water that is 0.2 ml of water is needed for the given recipe.
What is percentage composition?The percentage composition of a compound or sample is the percentage fraction of each of its constituent components. For example, if we consider the compound magnesium carbonate pentahydrate, we can say the percentage composition for each component magnesium carbonate and water.
The density of water is 1 g/ml. Hence, 1 gm of water is equivalent to the volume of 1 ml for water. Given that, for making 2 g of the suppositories, 10 parts of water is required. Take this as the percentage composition of water in 2 g.
Hence, 10% of water is needed.
10 % of 2 = 10/100× 2 = 0.2 g
Therefore, 0.2 g or 0.2 ml of water is required.
To find more on percentage composition, refer here:
http://brainly.com/question/1350382
#SPJ2
List a few principles you would like to cultivate and describe your plan of action for cultivating them.
I love statistics So I will use The principles of it
[tex] \begin{cases}\\ \dag \: \underline{\Large\bf Formulas\:of\:Statistics} \\ \\ \bigstar \: \underline{\rm Mean:} \\ \\ \bullet\sf M=\dfrac {\Sigma x}{n} \\ \bullet\sf M=a+\dfrac {\Sigma fy}{\Sigma f} \\ \\ \bullet\sf M=A +\dfrac {\Sigma fy^i}{\Sigma f}\times c \\ \\ \bigstar \: \underline{\rm Median :} \\ \\ \bullet\sf M_d=\dfrac {n+1}{2} \:\left[\because n\:is\:odd\:number\right] \\ \bullet\sf M_d=\dfrac {1}{2}\left (\dfrac {n}{2}+\dfrac {n}{2}+1\right)\:\left[\because n\:is\:even\:number\right] \\ \\ \bullet\sf M_d=l+\dfrac {m-c}{f}\times i \\ \\ \bigstar \: {\boxed{\sf M_0=3M_d-2M}}\end {cases}[/tex]
Answer:
• Algebraic expression is formed from variables and constants using
different operations.
• Expressions are made up of terms.
• A term is the product of factors. Factors may be numerical as well as
algebraic (literal).
• Coefficient is the numerical factor in a term. Sometimes, any factor
in a term is called the coefficient of the remaining part of the term.
• The terms having the same algebraic factors are called like terms.
• The terms having different algebraic factors are called unlike terms.
• Expression with one term is called a 'Monomial’.
• Expression with two unlike terms is called a 'Binomial’.
• Expression with three unlike terms is called a 'Trinomial’.
• In general, an expression with one or more than one term (with non-
negative integral exponents of the variables) is called a ‘Polynomial’.
• The sum (or difference) of two like terms is a like term with coefficient
equal to the sum (or difference) of coefficients of the two like terms.
A patient is to take 2 2/3 tablespoons of medicine per day in 3 equally divided doses. How much medicine is to be taken in each dose
Answer:
24656hghh
Explanation:
rvchxhbjytytgyyugh
1. Explain why you agree or disagree that HPV should be mandatory for both Male and female teenagers.
Answer:
Agree because
Explanation:
HPV vaccination is cancer prevention. HPV is estimated to cause nearly 36,000 cases of cancer in men and women every year in the United States. HPV vaccination can prevent more than 32,000 of these cancers from ever developing by preventing the infections that cause those cancers.
Please put the following symptoms of the common cold in the order in which they usually appear. Runny nose, itchy throat, cough, chest congestion
You think you are allergic to an airborne a pollen from almond flowers. What would you do to test whether you have an allergic hypersensitivity to this allergen
Hi,
Answer:
You think you are allergic to an airborne a pollen from almond flowers. What would you do to test whether you have an allergic hypersensitivity to this allergen ?
- Skin test or blood test
Urothelium is found in...
Answer:
Urothelium is found in “urinary structures such as the ureter, urinary bladder, and proximal urethra.”
Can i bath my cath with anti lice shampoo for fleas?
Answer:
yes you can
but I give you some pictures for it